Following Jutland, the first of the Naval Campaigns series, Tsushima builds on the REALTIME game engine that allows the player to play against the computer or against another player (or players) online. Tsushima is a tactical battle simulation which models individual ships and capabilities.

Eleven scenarios include the full battle of Tsushima, smaller scenarios of different times of the battle, and an alternative battle that combines the Russian Baltic and Pacific Fleets. Bonus scenarios include the battles of Yellow Sea and Ulsan.